/*      $NetBSD: if_bwi_pci.c,v 1.18 2023/12/20 05:08:34 thorpej Exp $  */
/*      $OpenBSD: if_bwi_pci.c,v 1.6 2008/02/14 22:10:02 brad Exp $ */

/*
 * Copyright (c) 2007 Marcus Glocker <mglocker@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * Broadcom AirForce BCM43xx IEEE 802.11b/g wireless network driver
 * PCI front end
 */


#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_bwi_pci.c,v 1.18 2023/12/20 05:08:34 thorpej Exp $");

#include <sys/param.h>
#include <sys/callout.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/systm.h>

#include <sys/bus.h>

#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_ether.h>
#include <net/if_media.h>

#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_amrr.h>
#include <net80211/ieee80211_radiotap.h>

#include <dev/ic/bwivar.h>

#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>

/* Base Address Register */
#define BWI_PCI_BAR0 PCI_BAR(0)

static int      bwi_pci_match(device_t, cfdata_t, void *);
static void     bwi_pci_attach(device_t, device_t, void *);
static int      bwi_pci_detach(device_t, int);
static void     bwi_pci_conf_write(void *, uint32_t, uint32_t);
static uint32_t bwi_pci_conf_read(void *, uint32_t);

struct bwi_pci_softc {
        struct bwi_softc         psc_bwi;

        pci_chipset_tag_t        psc_pc;
        pcitag_t                 psc_pcitag;

        bus_size_t               psc_mapsize;
};

CFATTACH_DECL_NEW(bwi_pci, sizeof(struct bwi_pci_softc),
    bwi_pci_match, bwi_pci_attach, bwi_pci_detach, NULL);

static const struct device_compatible_entry compat_data[] = {
        { .id = PCI_ID_CODE(PCI_VENDOR_BROADCOM,
                PCI_PRODUCT_BROADCOM_BCM4303), },

        { .id = PCI_ID_CODE(PCI_VENDOR_BROADCOM,
                PCI_PRODUCT_BROADCOM_BCM4306), },

        { .id = PCI_ID_CODE(PCI_VENDOR_BROADCOM,
                PCI_PRODUCT_BROADCOM_BCM4306_2), },

        { .id = PCI_ID_CODE(PCI_VENDOR_BROADCOM,
                PCI_PRODUCT_BROADCOM_BCM4307), },

        { .id = PCI_ID_CODE(PCI_VENDOR_BROADCOM,
                PCI_PRODUCT_BROADCOM_BCM4309), },

        { .id = PCI_ID_CODE(PCI_VENDOR_BROADCOM,
                PCI_PRODUCT_BROADCOM_BCM4311), },

        { .id = PCI_ID_CODE(PCI_VENDOR_BROADCOM,
                PCI_PRODUCT_BROADCOM_BCM4312), },

        { .id = PCI_ID_CODE(PCI_VENDOR_BROADCOM,
                PCI_PRODUCT_BROADCOM_BCM4318), },

        { .id = PCI_ID_CODE(PCI_VENDOR_BROADCOM,
                PCI_PRODUCT_BROADCOM_BCM4319), },

        { .id = PCI_ID_CODE(PCI_VENDOR_BROADCOM,
                PCI_PRODUCT_BROADCOM_BCM4322), },

        { .id = PCI_ID_CODE(PCI_VENDOR_BROADCOM,
                PCI_PRODUCT_BROADCOM_BCM43XG), },

        { .id = PCI_ID_CODE(PCI_VENDOR_BROADCOM,
                PCI_PRODUCT_BROADCOM_BCM4328), },

        PCI_COMPAT_EOL
};

static int
bwi_pci_match(device_t parent, cfdata_t match, void *aux)
{
        struct pci_attach_args *pa = aux;

        return pci_compatible_match(pa, compat_data);
}

static void
bwi_pci_attach(device_t parent, device_t self, void *aux)
{
        struct bwi_pci_softc *psc = device_private(self);
        struct pci_attach_args *pa = aux;
        struct bwi_softc *sc = &psc->psc_bwi;
        const char *intrstr = NULL;
        pci_intr_handle_t ih;
        pcireg_t memtype, reg;
        int error = 0;
        char intrbuf[PCI_INTRSTR_LEN];

        aprint_naive("\n");
        aprint_normal(": Broadcom Wireless\n");

        sc->sc_dev = self;
        sc->sc_dmat = pa->pa_dmat;
        psc->psc_pc = pa->pa_pc;
        psc->psc_pcitag = pa->pa_tag;

        /* map control / status registers */
        memtype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, BWI_PCI_BAR0);
        switch (memtype) {
        case PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT:
        case PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_64BIT:
                break;
        default:
                aprint_error_dev(self, "invalid base address register\n");
                return;
        }

        if (pci_mapreg_map(pa, BWI_PCI_BAR0, memtype, 0, &sc->sc_mem_bt,
            &sc->sc_mem_bh, NULL, &psc->psc_mapsize) != 0) {
                aprint_error_dev(self, "could not map mem space\n");
                return;
        }

        /* map interrupt */
        if (pci_intr_map(pa, &ih) != 0) {
                aprint_error_dev(self, "could not map interrupt\n");
                goto fail;
        }

        /* establish interrupt */
        intrstr = pci_intr_string(psc->psc_pc, ih, intrbuf, sizeof(intrbuf));
        sc->sc_ih = pci_intr_establish_xname(psc->psc_pc, ih, IPL_NET, bwi_intr,
            sc, device_xname(self));
        if (sc->sc_ih == NULL) {
                aprint_error_dev(self, "could not establish interrupt");
                if (intrstr != NULL)
                        aprint_error(" at %s", intrstr);
                aprint_error("\n");
                goto fail;
        }
        aprint_normal_dev(self, "interrupting at %s\n", intrstr);

        /* we need to access PCI config space from the driver */
        sc->sc_conf_write = bwi_pci_conf_write;
        sc->sc_conf_read = bwi_pci_conf_read;

        reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);

        sc->sc_pci_revid = PCI_REVISION(pa->pa_class);
        sc->sc_pci_did = PCI_PRODUCT(pa->pa_id);
        sc->sc_pci_subvid = PCI_VENDOR(reg);
        sc->sc_pci_subdid = PCI_PRODUCT(reg);

        if (!pmf_device_register(self, bwi_suspend, bwi_resume))
                aprint_error_dev(self, "couldn't establish power handler\n");

        error = bwi_attach(sc);
        if (error)
                goto fail;
        return;

fail:
        if (sc->sc_ih) {
                pci_intr_disestablish(psc->psc_pc, sc->sc_ih);
                sc->sc_ih = NULL;
        }
        if (psc->psc_mapsize) {
                bus_space_unmap(sc->sc_mem_bt, sc->sc_mem_bh, psc->psc_mapsize);
                psc->psc_mapsize = 0;
        }
        return;
}

int
bwi_pci_detach(device_t self, int flags)
{
        struct bwi_pci_softc *psc = device_private(self);
        struct bwi_softc *sc = &psc->psc_bwi;

        pmf_device_deregister(self);

        bwi_detach(sc);

        if (sc->sc_ih != NULL) {
                pci_intr_disestablish(psc->psc_pc, sc->sc_ih);
                sc->sc_ih = NULL;
        }

        return (0);
}

static void
bwi_pci_conf_write(void *sc, uint32_t reg, uint32_t val)
{
        struct bwi_pci_softc *psc = (struct bwi_pci_softc *)sc;

        pci_conf_write(psc->psc_pc, psc->psc_pcitag, reg, val);
}

static uint32_t
bwi_pci_conf_read(void *sc, uint32_t reg)
{
        struct bwi_pci_softc *psc = (struct bwi_pci_softc *)sc;

        return (pci_conf_read(psc->psc_pc, psc->psc_pcitag, reg));
}